Interior pipe-wrench.



G. RAII'HEL. INTERIOR PIPE WRENCH.

APPLICATION FILED SEPT. a, 1912.

Patented July 8, 1913.

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GEORGE RAITHEL, OF FORT ATKINSON, WISCONSIN, ASSIGNOR OF ONE-HALF T0 E. F. JAEI-INKE, 0F FORT ATKINSON, WISCONSIN.

INTERIOR FIFE-WRENCH.

To all whom it may concern Be it known that I, GEORGE Itarrnnn, a citizen of the United States, residing at Fort Atkinson, county of Jefferson, and State of Wisconsin, have invented new and useful Improvements in Interior Pipe renches, of which the following is a specification.

My invention relates to improvements in interior pipe wrenches.

The object of my invention is to produce a practical tool for gripping the interior surfaces of pipes, fittings, etc., and also to produce a tool which may be efficiently used to move them either rotatively or longitudinally.

In the drawings,Figure 1 is a side view of my improved tool in position for use, one of the jaws being partially broken away, and a portion of a pipe being illustrated in section. Fig. 2 is a cross sectional view of the same, drawn through the pipe and gripping jaws. Fig. 3 is a side View of a substitute jaw adapted for pipes of larger diameter. Fig. 4 is a side view of a substitute jaw adapted for moving pipes or fittings axially. Fig. 5 is a fragmentary view illustrating the use of my improved wrench when equipped with the jaws illustrated in Fig. 5. Fig. 6 is a face view of one of the jaw supporting arms with the jaw removed.

Like parts are identified by the same reference characters throughout the several views.

A pair of parallel, or substantially parallel, levers 1 and 2 are pivoted to each other at 8 and provided with jaw supporting arms t having their outer faces grooved as illustrated in Fig. 6. The longitudinal groove 7 is adapted to receive a flange 8 on a pipe rotating jaw 9, when the latter is applied to the jaw, and the jaw supporting arm may be otherwise secured to the arm by one or more screws or bolts 11. The outer surfaces of the jaws 9 are hollowed out transversely, forming pipe gripping edges at 12.

The jaws 13 shown in Figs. 4c and 5 are provided with cross flanges 1 1- and 15 which are adapted to fit the cross grooves 16 and 17 in the jaw supporting arm. These jaws 13 may also be provided with a longitudinal flange 18 adapted to fit a portion of the groove 7 and this jaw may be also secured to the arm by one or more screws or bolts. The interlocking flanges receive the strain,

Specification of Letters Patent.

Application filed. September 9, 1912.

Patented J uly 8, 1913. Serial No. 719,501.

the object of the screws being merely to retain the jaws in position when not in use.

In operation, the proper jaws being in position, the device is inserted in a pipe or fitting, and the outer ends of the handles or levers pressed together, thus causing the jaws to engage the interior walls of the pipe with sutlicient pressure to hold it, whereupon the pipe may be moved (rotated or moved longitudinally) as required.

I preferably employ means for mechanically pressing the handles together, such as a yoke 24: adapted to embrace the handles, and a set screw 25 threaded in one end of the yoke 24 in a position to force the handles together. This enables me to press the jaws against the interior pipe walls with great force and provides means for mechanically maintaining the pressure when the tool is in operation.

A lever 26 having a hook shaped member 27 may be employed to rotate the wrench proper. The member 27 loosely engages over the lever handles, as shown in Fig. 1, whereby a rotation of lever 26 rotates the handles and jaws. The lever being in the form of an open hook, it may be removed when it is not required.

1. An interior pipe wrench comprising the combination of a pair of levers pivoted together at an intermediate point, each lever having its arms on the same side of the opposing lever, and a gripping jaw on the outer face of one arm of each lever in a position to engage the interior surface of a pipe or fitting, and laterally-projecting means for rotating the levers.

2. An interior pipe wrench comprising the combination of a pair of levers pivoted together at an intermediate point, each lever having its arms on the same side of the opposing lever, and a gripping jaw on the outer face of one arm of each lever in a position to engage the interior surface of a pipe or fitting, and a wrench arm adapted to facilitate the rotation of said pivoted levers and the parts engaged by said gripping jaws.

3. An interior pipe wrench comprising the combination of a pair of levers pivoted together at an intermediate point, each lever having its arms on the same side of the 0pposing lever, and a gripping aw on the outer face of one arm of each lever in a position to engage the interior surface of a pipe or fitting, said jaws being removably interlocked with the lever arms against transverse movement with reference thereto substantially as described.

4. The combination of a pair of levers pivoted together at an intermediate point, each lever having its arms on the same side of the opposing lever, and a gripping jaw on the outer face of one arm of each lever in a position to engage the interior surface of a pipe or fitting, said jaws being removable, and said lever arms being grooved both longitudinally and transversely to receive interlocking jaws of different character.

5. An interior pipe wrench comprising the combination of a pair of levers pivoted together at an intermediate point, each lever having its arms on the same side of the opposing lever, and a gripping jaw on the outer face of one arm of each lever in a position to engage the interior surface of a pipe or fitting together with a clamping member provided with a set screw adapted for applying mechanical pressure to said levers at the ends opposite the jaw supporting arms to expand the jaws against the work.

6. The combination with a set of substantially parallel levers, pivoted together at an intermediate point and provided with outwardly facing, pipe gripping jaws at one end, a clamping member engaging the other end portions of said levers and adapted to force them toward each other, and a bar adapted to removably engage the clamped ends of said levers and projecting transversely thereto to facilitate rotation thereof.

7. The combination with a set of uncrossed levers pivoted together at an intermediate point and a series of sets of jaws of different character, each set adapted to be secured to the working arms of the levers interchangeably with those of the other sets, each of said jaws being adapted to fit the outer face of the lever arm and formed to engage the interior wall of a pipe or fitting.

8. The combination with a set of uncrossed levers pivoted together at an intermediate point and a series of sets of jaws of different character, each set adapted to be secured to the working arms of the levers interchangeably with those of the other sets, each of said jaws being adapted to fit the outer face of the lever arm and formed to engage the interior wall of a pipe or fitting, together with a clamping yoke embracing the actuating arms of said levers and a set screw for pressing said arms together.

In testimony whereof I affix my signature in the presence of two witnesses.

GEORGE RAITHEL. Witnesses H. G. D. NUTTING, Gno. A. POTTER.

( Jopies or this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

